Eb 13b9, 3rd inversion (C# in the bass)
Also written as Eb13b9/C#.
Notes, from the bass up
C# (bass)EB#D#GA#
The same notes as Eb 13b9 (C#, E, B#, D#, G and A#), rearranged so C# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.